package com.zhaowb.springcloud.common.util;

import javax.servlet.http.HttpServletRequest;

/**
 * Created with IDEA
 *
 * @author zhaowb
 * @date 2018/10/30 21:07
 */
public class ClientUtil {

    private static final String UNKNOWN = "unknown";

    /**
     * 获取客户端真实ip
     *
     * @param request request
     * @return
     */
    public static String getClientIp(HttpServletRequest request) {

        String ip = request.getHeader("x-forwarded-for");
        if (ip == null || ip.length() == 0 || UNKNOWN.equalsIgnoreCase(ip))
            ip = request.getHeader("Proxy-Client-IP");
        if (ip == null || ip.length() == 0 || UNKNOWN.equalsIgnoreCase(ip))
            ip = request.getHeader("WL-Proxy-Client-IP");
        if (ip == null || ip.length() == 0 || UNKNOWN.equalsIgnoreCase(ip))
            ip = request.getRemoteAddr();
        return ip;
    }
}
